多(多)网卡冗余与负载均衡（Redundancy and load balancing of multiple (multiple) network cards）.doc

多(多)网卡冗余与负载均衡（Redundancy and load balancing of multiple (multiple) network cards） Multi redundancy and load balancing network card redundancy error: AFT (Adapter Fault Tolerance) technology is a kind of a redundant connection between the server and the switch technology, which is installed two network cards on the server, a main card, another one as a backup card, then two cards are connected to the switch on two cable. The basic working process of AFT technology is that when two pieces of card assembly in the Netware or NT server, AFT technology will be able to put the two pieces of card card work as a group to treat, a main card, the other one is the standby card. When the main network card is working, the intelligent software monitors the main network card and the connection state through an alternate network card, that is, a special design trial bag is used to monitor the connection. If the connection fails, the trial package will not be able to serve the main network card. The smart software will immediately transfer the work (including the MAC network address) to the standby network card after finding the situation. Since all configuration information is transferred to the standby network adapter in a flash, the network user will not notice any changes and will not cause any pressure on the server operating system. The establishment of AFT technology in the redundancy between the server and the network connection may include a network adapter, and a hub or switch port, a connection server for normal network communication, another connection provides backup, in order to improve the network management of AFT, once found any connection failure, will send the alarm signal, so AFT with high reliability and error recovery security. NIC: load balancing: traditional methods of increasing the bandwidth and server throughput is increased to expand a network card on the server is divided into two segments, although can reduce half of the communication pressure, can allev